For the past 2 months I ve been experiencing a lot of phlegm in my throat. When I try to cough it up, nothing happens. I have no sneezing, runny nose or any other symptoms of a common cold, just phlegm. To add onto that, about 2 weeks ago I started experiencing head pressure during the night, which wakes me up. I can only sleep if my head is not touching anything. I have no idea if these issues are related and I d really like some help. I ve done a CT scan for the headaches at night, which revealed nothing.